Results 81 to 90 of about 856 (156)

A singular M-matrix perturbed by a nonnegative rank one matrix has positive principal minors; is it D-stable?

open access: yes, 2014
The positive stability and D-stability of singular M-matrices, perturbed by (non-trivial) nonnegative rank one perturbations, is investigated. In special cases positive stability or D-stability can be established. In full generality this is not the case,
Bierkens, Joris, Ran, André
core   +2 more sources

Stability of a secondary dengue viral infection model with multi-target cells

open access: yesAlexandria Engineering Journal, 2022
Dengue is one of the vector-borne diseases spread in most parts of the world. The number of infected individuals is increased each year. This paper proposes a mathematical model describing the secondary dengue viral infection in micro-environment.
M.A. Alshaikh   +2 more
doaj   +1 more source

On weak exponential expansiveness of skew-evolution semiflows in Banach spaces

open access: yes, 2014
The aim of this paper is to give several characterizations for weak exponential expansiveness properties of skew-evolution semiflows in Banach spaces. Variants for weak exponential expansiveness of some well-known results in uniform exponential stability
Tian Yue, Xiaoqiu Song, Dong-Qing Li
semanticscholar   +1 more source

Optimal Control for a COVID-19 Model Accounting for Symptomatic and Asymptomatic

open access: yesComputational and Mathematical Biophysics, 2020
Building on an SEIR-type model of COVID-19 where the infecteds are further divided into symptomatic and asymptomatic, a system incorporating the various possible interventions is formulated.
Macalisang Jead M.   +3 more
doaj   +1 more source

Study of transmission pattern of COVID-19 among cardiac and noncardiac population using a nonlinear mathematical model

open access: yesComputational and Mathematical Biophysics
Recent studies have intensified the risk of post-COVID-19 cardiovascular diseases. In an effort to understand the intricate dynamics of COVID-19 infection, this article suggests a four-compartment model to portray the dynamic interplay between the ...
Shirisha Gopishetty, Vernekar Saroj
doaj   +1 more source

Classical and fractional analysis of the effects of Silicosis in a Mining Community

open access: yesAlexandria Engineering Journal, 2020
A mathematical model for the transmission dynamics of silicosis in a mining environment is designed and its qualitative analysis is given. The model takes into account the severity of silica dust exposure in a mining environment.
H.M. Tenkam   +5 more
doaj   +1 more source

Levinson Theorem for Differential Equations with Piecewise Constant Argument Generalized [PDF]

open access: yes, 2015
In this work, it is presented an adaptation of an asymptotic theorem of N. Levinson of 1948, to differential equation with piecewise constant argument generalized, which were introduced by M. Akhmet in 2007.
Castillo, Samuel, Flores, Wilfred
core  

On modelling of epidemic childhood diseases with the Caputo-Fabrizio derivative by using the Laplace Adomian decomposition method

open access: yesAlexandria Engineering Journal, 2020
We present a fractional-order epidemic model for childhood diseases with the new fractional derivative approach proposed by Caputo and Fabrizio. By applying the Laplace Adomian decomposition method (LADM), we solve the problem and the solutions are ...
Dumitru Baleanu   +3 more
doaj   +1 more source

Weak instability of Hamiltonian equilibria

open access: yes, 2012
This is an expository paper on Lyapunov stability of equilibria of autonomous Hamiltonian systems. Our aim is to clarify the concept of weak instability, namely instability without non-constant motions which have the equilibrium as limit point as time ...
Zampieri, Gaetano
core  

Lyapunov theorems for Banach spaces [PDF]

open access: yes, 2011
The final version of this paper appears in: "Bulletin of the American Mathematical Society" 31 (1994): 44-49. Print.We present a spectral mapping theorem for semigroups on any Banach space E.
Latushkin, Yuri, 1956-   +1 more
core  

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